Speedometer.



E. SCHNEIDER. SPEBDOMETER. v `APPLIUAT-ION FILED 00T. Z9, 1907.

' Patented oen. 26, 1909.

S'SBBIGTBh-SHEET 1.

f y E. SCHNEIDER.

, SPEEDOME'TBR.

APPLICATION FILD 00T. 29, 1907.

3 SHEETS-SHEBT-2 i r1; I

Patented 0013.26, 1909.

E. SCHNEIDER.

i SPBEDOMLTER. APPLICATION FILED 00T.29, 1907.

Patented oct. 26,1909.

3 SHEETS-SHEET 3.

6 s uw n ma y VN n A.

uniTED STATES.

ERNEST seHNErnER, or vrEnNn, .AUSTRIA-HUNGARY. w

i sPEEnoMETEE. i'

Kspecification of' Leners Patent.

PATENroFEioE;

A Application mea october 29, 19o?.l seal No. 399,719.

. hereby dec are the following to be a ull,

clear, andexact description of the invention, such as will enable others skilled in the art to which it`appertains to make and use the same.

The speedometer according to this invention is connected to an ordinary clock work, which couples a spindle toan indicator de- -vice intermittently` fora definite eriod of# Av1D.

time, vso that the'index of the in icator is set in accordance with the speed of the spindle .at the time.y For this purpose the clockwork drives with 4a constant speed another spindle provided with cams, by the 'action' of which is brought about the coupling and uncouplng of the driving gear for the indicator device, as well as a complete re-V lease of the latter for the return tothe zero position.-

'The s indle to .be coupled by means of." the cloc ork to the indicator device, can be connected in any suitable manner to the spindle or axle the speed of which is to be measured, for instance to the axle of a motor car, locomotive or to the spindle of a knot measuringv device of a ship, etc. The apparatus according to this invention is' illustrated'in the accompanyin drawing in Figure 1 in front'elevation an in Fig. 2 lan, the 'wheel gear and the balance, to-

er with leven, being left out for the sake of,elearness, or indicated onlyto such extent as necessary for understanding'. the drawing. lSimilarly in Fig. 1 the frontvplate of the clockwork is not shown, Figs. 3, 4, 5 and 6 show 'iour characteristic positions of the indicator apparatus in connection with thecams bringing about thecoupling veruncoupling of the drive andthe release of the indlcator device, and Figs. 7 and 8 a're'detail' views.

The flexible spindle 1 ,connected to the axle of the vehicle, drives a toothed wheel 2 .engaging with la toothed wheel 3. The spindle 4 of the latter is supported by means of a system of levers, the twoarms 6 and 7 of which'are mounted on a spindle8 'sup orted between points. Ourthe spindle Iis rther mounted @toothed wheel 9 which, Wh?? lever system 6 ably turned, can come into engagementwith whichis provided with a ever arm 11 and driver -pin or tappet 12. A spiral spring 13 always has the tendency-to brin the toothed pin 12 yprojects forward tol such. an extent that it can d rlve an index 14 moving along always bring backl the position. In order to accordance with the speed by the turning of the arm 11 and ofthe toothed wheel 10, the toothed wheel 9- isbrought intermittently into engagement with theltoothed wheel 10 toothed wheel 9 is driven during thefmovetoothed wheels 2 and 3, invaccord'ance withthe 'speed of the vehicle, 10, during the engagement with the toothed wheel 9 which lasts only a short time, will also be turned. to a certain extent by the and the pin 12 engaging. with the toothed v'wheel 10' mounted on the lever arrn 6, holds thereupon that position. 0 is thus set tothe speed which the vehicle vhad at that moment. In order, however., 'to

moments, the j operation lof 'the lapparatus must be started afresh, Aandthust-he toothed brought to the zero position. VThis release effected by a: corresponding' movement of the lever arm 7, which also brings the' turn again to the zero "position, but thektime another. toothed Wheel l0 the spindle of toothed wheel 9, and the saidturningjor rotation will be communicated by the, arm 11'` to the index Y14:. A pawl 16' ascertain 'the speed at the next' lfollowing toothed wheels 9 and 10 into or out of. enf

of engagement with the toothed" Patented Oct; 26,

7 and the spindlelli are suit? i wheel 10 and the lever 11 into t e zero posi- 4"tion shown in Figs. land 2. The driver a scale, a 'spring 15 having the tendency to l said index to its zero;

shiftthe finger 14;' in

by turning the lever system 6 7. As the ment of the vehicle by the .spindle land the' the toothed wheel l the indicator device during a certain time in i The. index.l of the apparatus t wheel 10 with thel lever arm 11y 'again .i

of the toothed wheel 1 0 withthe leverll is or4 slightly raised.- During s further ascent of he lever 7,'the pawl 16v `1s.

pin 18 and raising the pawl.'

which the index would remain set,

would` be too short for readin the ind-ication of the apparatus, and wou d requirean excessivel attention 4ofthe driver which would 'distract him from his proper. duties.

In order to revent the instantaneous swinging back o the index 14, there is pro vided a. pawl engagin" with a vratchet Wheel 19 secured to the index 14. The-said pawl 20 is mounted on a double armed lever 21, the free end of which, provided with a transverse pin 21, is pressed by a spring 22 against a cam 4disk 23 mounted on a' spindle ,27, the said cam disk 23'beir. provided with a recess 24. As soon as the pin21, at the rotation `of the spindle 27 driven by the cloekworkjengages with thel said recess 24,

the pawl 20 is disengaged from thc ratchet Wheel 19, andthe index 14 can freely spring back'under the ac'tion of the spring 15.

` The movement of the lever system 6, 7 for coupling and uneoupling the toothed wheels- 9 and 10, as well as for releasing the toothedfwheel' 10 from the pawl 16, is effectedby a cam disk 26 also mounted on the spindle 27, on which cam slides a nger mountedA on the lever arm 7. The cam disk 26 isprovided with three different tracks or races.

track of the cam disk 26, the toothed wheel 9 is `in engagement with the Wheel 10 (see Figs. 1 and 3).

Thei'toothed wheel 10 is driven from the vflexible spindle 1 by means of toothed wheels 2 and 3 and toothed Wheels 9, andthe driv ing lasts each time as long 'as the finger or projection 25 is on the lowest track of the cam disk. 26.'- The index is during that time driven by a pin 12 in the direction ofthe arrow 28 and is held in itsy position by the pawl '20 (Fig. When during further ro-` tation of the spindle 27 the projection 25 comes on the next highest track of the cam disk 26, then owing ,to the raising of the lever arm 7, the' toothed Wheel 9 is brought 'outiof engagement with the toothed Wheel 10v (Fig. 4). -The toothed wheel 10 on the lever 11 remains, however in that position as long asv the projection 25 is sliding on this second highest track of vthe cam disk. This short'period of rest of the arm 11 andV of the pin 1 2 is necessary because, with the decreasing speed, thel index 14j would be first on a higher division of the scale of speed, 4and on belng released wouldspring back until. it

reaches' the stop pin 12. lWhen therefore,l the position ofthedever 7 and of the cam disk 26 shown in. Fig. 4 is reached, the.in dex 14 must be released as shown in Fig. 5.

l At that moment the pin 21 mounted on the lever 21,- engages Iwith the recess 24 of the .cam diskf23,iand the'pawl 2O releases the ratchet wheel 19.

` When theindex'is on a higher division When the finger 25' is resting on the last seems ofthe scale, as shown dotted in Fig. ,5, it

`'will spring back under the action of the spring 15 1n the direction of the arrow 2.9i,

until it strikes'the stop pin 12l which in the meantime has been brought again, by

the movement of the toothed Wheel 10, f`ro1n the aero point to vthe position corresponding'. to the speed at the tnne, whereupon,

vduring further rotation of the cam disk 23,`

the pin 21 again comesout ofthe recess '24 and brings the pawl 20 into engagement with the ratchet wheel 19. When, there;

fore, the index 14 has reached that position of the scale corresponding to the speed of the vehicle, the activity of the lever l11 -for so". i

set-ting the index `is terminated, and the'L u lever can return to its zero position. During further rotation of the spindle 27, the projection 25 of the lever arm 7 vcomes .to the the arm 17 of the pawl 16 is cause'l to strike the stop pin-ISand-lifts the pawl 16 out of highest'track of the cam disk l26 whereby engagement with the toothed wheel 10, so

that the latter, aswell as the lever ar'fm 11, can swing back into the zcrofposition in the direction shown by the arrow7 30 (Fig. 6). `After the tooth-ed wheel 10 and the armA 1 1 have been brought into the zero position, the

described operation can begin afresh, the projection 25 ot thclever 7 coming again as shown in .the position in Fig. 3.,'on1to the lowest track of the cam disk26 and bringing about the engagement of the toothed Wheels y 9 and 10, and so on.

A springing back 4of the index 14 in the position of the parts shown in Fig. 5 takes place onlywhen the speed is decreasing, that of the index 14. If, however, speed remains the same or is increasing, the pin 1'2 Will reach the index 14, or drive the index farther toa higher division on the scale `of speed: It follows, therefore, that when the apparatus is Working, the index 14 receives yis to say, when thestop pin 12 of the lever arm 11 does not reach-theprevious position,A

constantly, at very short intervals of time, f

that time in a vehicle can never be-of ini-y' portance. i 'What I claim as my invention `and desire to secure by Letters Patent is:

1. The combination With a rotatable mem* ber, the speed of which is to be measured, of

a toothed wheel driven from the member, a

lever carrying .the toothed Wheel, a second toothed Wheel, an index operated by the last vnamed toothed Wheel, a clock Work, means for operating the lever from the clock work to move the first gear Wheel in and out of I mesh with the second gear Wheel, means -for locking the second gear Wheel in the position ithas becnmoved, and means for releasing the locking means' to permit the said Wheel 1to return .to zero position.

2. The' combination with a rotatable meni-` ber, the speed of'which is to'bemeasu'red,

I of a toothed wheel driven from the member,

a lever carrying the toothed wheel, a second toothed wheel, an index operated by the last named toothed wheel, a clock work, means for operating the lever from the clock work to move the first named gear Wheel in and out of mesh with the second gear wheel, a

` i pawl and ratchet mechanism for locking the second gear wheel in the position to which it has been moved, and a cam disk operated by the clock-work for disengagiiig the pawl from its ratchet wheel. i

I 3. In a speedometer, a lever provided With a projection, atoothed Wheel mounted in the lever, means for operating the toothed Wheel from the part, the speed of which' is to be measured, a second toothed wheel, an index operated by the second toothed wheel, a pawl carried by the lever for engaging 'the said seci ond toothed wheel, ,a stopl with which the pa wl engages, and a continuously driven 'egim disk rovided with three tracks, whereby the iirst toothed wheel will be moved in and out loi" mesh Withthe second toothed Wheel and ythe lpawl disengaged from the said second toothed Wheel.V 'g 4:. In a speedometer, a double armed lever, a toothed Wheel mounted in one arm of the lever, means for'operating the toothed wheel from the part, the speed of which is to be measured, a second toothed wheel, an index opera-ted by the second toothed wheel, a pawl cai'ied by the other arm of tlielevcr and engaging the second toothed wheel, a stop with Wheel on the shaft of the second tooth l.d

wheel, a pawl engaging t-he ratchet wheel, and a continuously driven cam disk provided with a recess and with which the pawl engages.

(3. Inja speedometer, a wheel spring'- actui ated in one direction, means for operating the Wheel ina direction opposite to that of the spring, from the part, the speed of which is to be measured, means for disengaging the operating means and releasing said wheel to permit it to be returned to zero position by its spring, an index, means for operating the index from said Wheel, .a

:s Jrinfr for returninv the index to zei'o osition, a ratchet Wheel to which the index is secured, a springv pressed pawl for engaging the ratchet wheel, said pawl being pivoted intermediate of its ends, and a recessed cam with which one end of said pawl engages,

gagement with the ratchet wheel' until the pawl enters the recess When vthe pawl will be disengaged from the ratchet Wheel.

In testimony whereof I have signed 'my name to thispeeiiicationfin the t'wo subscribing Witnesses.

ERNEST SCHNEIDER.

' Vitnessesv:

l/VEixzEL SINKE, AUGUST FUGGER.

.said cam serving to hold the pawl in enpresence of y 

